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New ESPHome external component `ccp`: a CAN Calibration Protocol master on can_gateway (single-frame CRO/DTO, no ISO-TP). Full command set + high-level read_memory/write_memory helpers, ESPHome actions, on_connected/on_response/ on_error/on_daq triggers, and a pure host-testable ccp_proto.h codec. Every field (command/response CAN ids, station address, byte order, timeout) is configurable; the schema defaults and every test/example address are generic placeholders, not tied to any one ECU. Observe-first safety: no auto-connect, allow_write gates every write command; emits USE_CAN_GATEWAY_OBSERVE. Gates green: script/check.sh (14 ccp schema tests, both build fixtures, clang-format, esphome config); make -C tests/host (5 ccp_proto cases incl. little-endian SET_MTA and 12->5/5/2 read chunking).
Both ccp build fixtures (default read-only, allow_write:true) now compile in CI alongside the rest of the matrix, so a ccp change is gated the same as every other component before it can reach main. Claude-Session: https://claude.ai/code/session_01JpmPzXhUDovTMWBiNMzb89
Branch protection on main will require this one context rather than every individual compile-matrix leg by name, so renaming or adding a build fixture never requires touching the ruleset. Claude-Session: https://claude.ai/code/session_01JpmPzXhUDovTMWBiNMzb89
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Summary
New ESPHome external component
ccp: a CAN Calibration Protocol master oncan_gateway (single-frame CRO/DTO, no ISO-TP). Full command set + high-level
read_memory/write_memory helpers, ESPHome actions, on_connected/on_response/
on_error/on_daq triggers, and a pure host-testable ccp_proto.h codec.
timeout) is configurable; the schema defaults and every test/example
address are generic placeholders, not tied to any one ECU.
allow_writegates every writecommand; emits
USE_CAN_GATEWAY_OBSERVE.Recreated as a fresh PR in this new repository (see the project handover
notes for why); the original PR #18 on the prior repo covered the same
work. (Supersedes #1, which was opened against the wrong head branch and
pulled in unrelated work.)
Test plan
script/check.sh— 14 ccp schema tests, both build fixtures,clang-format, esphome config, all green.
make -C tests/host— 5 ccp_proto cases incl. little-endian SET_MTAand 12->5/5/2 read chunking, all green.
script/check_no_private_data.py— clean.